FTP and router issue

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From: Omair (okhan1_at_campus.hpu.edu)
Date: 05/13/04 

Date: Thu, 13 May 2004 02:11:02 -0700

hi.. i have win2k server.. trying to setup an ftp server through a router.. both port and passive modes work fine using the internal router IP addresses but the moment i try to use the external IP address i get problems..

i have forced ftp passive mode to data transfer over port 8001. As such.. ports 21 and 8001 have been forwarded on the router...

suppose my internal IP for the server is i.i.i.i and the external IP is e.e.e.e

when i try to connect to the ftp server from another machine in the network using the internal IP (i.i.i.i) it works just fine. But when i try to use the external IP i get major problems (e.e.e.e) as follows:

WINSOCK.DLL: WinSock 2.0
Ipswitch WS_FTP LE 6.0 2003.11.04, Copyright © 1992-2003 Ipswitch, Inc.
- -
connecting to e.e.e.e:21
Connected to e.e.e.e port 21
220 X Microsoft FTP Service (Version 5.0).
USER administrator
331 Password required for administrator.
PASS (hidden)
230-Welcome to X
230 User administrator logged in.
PWD
257 "/" is current directory.
SYST
215 Windows_NT version 5.0
Host type (S): Microsoft NT
PASV
227 Entering Passive Mode (i,i,i,i,31,65).
connecting to i.i.i.i:8001
- -
connecting to i.i.i.i:8001
Connected to i.i.i.i port 8001
LIST
426 Connection closed; transfer aborted.
! Retrieve of folder listing failed (4)

So as you can see i have 2 problems right now..

(1) The server returns the internal IP with the data port. this is no good for people that are trying to connect from outside the network

(2) Why am i getting the Error 426 when i am trying the connection from inside the network and it should be able to connect to the internal IP with no problems.

But it all works if i try to connect to the server in the first place using the internal IP and not the external..

I have tried changing the IP address under the server identification from (all undifined) to my external IP address but that just screws things up even more and doesnt let me even... i feel content that if we can solve the problem of changing the server from returning the internal IP to the external IP it should work just fine... i would REALLY appreciate any feed back and suggestions on this. thankyou SOOOO much!

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